Jigging-machine.



0. H. BOHM dz W. M. MoCOY. JIGGING MACHINE.

ArPLmATIoN funn A11z.9,1913v 1,091 ,035. Patented Mar. 24, 191i 4SHEETS-SHEET l.

0. H. BOHM L W. M. MoCOY. JIGGING MACHINE.

APPLICATION FILED APR. a, ma

1,091,035. Patented Mar. 24, 1914 4 SHEETS-SHEET 2.

ATTORNEYS 0. H. BOHM.& W. M. MGCOY.

JIGGING MACHINE.

APPLICATION FILED APB. 9, 1913 1 ,O9 1 ,035. Patented Mar. 24, 1914.

4 SHEETS-*SHEIBT 3.

ATTORNEYS 0. H. BOHM & W. M. McCOY.

JIGGING MACHINE.

APPLICATION ILED APR.9,1913

Patented Mar. 24, 1914,

4 8EBETB-SHEET 4,

WTNESSES ATTORNEYS 'UNITED STATES PATENT OFFICE.

OSCAR H.. BOI-IM AND W'ALTER M. McCOY, 0F BIRMINGHAM, ALABAMA.

JIGGING-MACHINE.

Specification of Letters Patent.

Patented Mar. 24, 1914.

Application led April t), 1813. Serial No. 759,901.

bama, have made certain new and useful Improvements in Jiggng-Machines,of which the following is a specification.

Our invention relates to improvements in the water controlling means andoiling means of jigging machines and other similar ty es of machinery,and it consists in the combinations, constructions, and arrangementsherein described and claimed.

An object of our invention is to provide a device in which the lworkingparts of the plunger reciprocating mechanism are submerged in oil so asto provide a thorough and constant lubrication, and vwhich protects thelubricating oil against contamination by grit, 4water, or other foreignsubstances.

A further object of our invention is to provide a device for holding theoil so that there is no escape for the latter, thereby rendering theoiling of the device far more economical than in the ordinary machine.

A further important object of our invention is to so design the plungerthat the bottom pgnig valvesI which control the ports in the plonger canbe taken out through the plunger without necessitating the removal ofthe latter.

A further object of our invention is to provide the underface of theplunger with a central countersunk recess or chamber surrounded byported walls set at an angle to thc horizontal bottom plane of theplunger and provided with a plurality of inwardly opening valves whichclose the ports on the down stroke of the plunger. This arrangementenables the valves to be set so that no countei-nveights or otherauxiliary means are necessary to insure their prompt closing. and italso places thein in the position where they operate in the ycleancstWater and are subject to a minimum wear.

.\ further object` of our invention ,is t0 provide a novel orin of valveor' door in i the plunger which prevents accumulation of vxater beyondthat which is desirable inl side of the plunger and also Asimplifies the5 construction and reduces wear on the parts.

provide a novel form of valve and plunger which is more positive inaction. and by means of which the back suetions affecting material onthe jigging sieve is practically eliminated.

Other objects and advantages willappear in the following specificationand thenovel features of the device will be particularly pointed out invthe appended claims.

Our invention is illustrated inthe accompanying drawings forming part ofthis application in which*- Figure l is a plan View of our invention asapplied to a jigging machine, Fig. 2 is an 'enlarged section through theplunger and eccentric, Fig. 3 is an enlarged detail View showing themeans of clamping the packing ring, Fig. 4 is a sectional view of theeccentric casing approximately on the line 4-4 of Fig.r2, the eccentric,Fig. 5 is an enlarged detail view of a modified form of pivotalhearingfor the wrist pin, Fig. 6 is a section along the line 6-6 ofk Fig. 2,Fig. 7 is a section-along the line 7-7 of Fig. 2, looking in thedirection of the arrows, Fig. 8 is a sectional view through a modifiedform I of the eccentric casing. Fig. 9 isa face view of one of theswinging flap valves` and Fig.- 10 is a vertical section through thejigging machine.

Oui.' invention may be applied to machines of vai' nis types. In thepresent instance ive haue a plied the invention to a jigging machine. Vehave shown only enough of the jigging machine proper to give a clearunderstanding of the application of our in vention.

Referring to Fig. l it will be seen that we have provided on the frame 1lof the machine. bearings 2 for the drive shafts 3.` In Fig. l ive'haveillustrated tivo of these jigging machines and a description of thenovel means of one will sutiice since they are both alike. The driveshaft 3 is provided with a loose pulley 4 and a fast pulley 5. Anysuitable reciprocating means may be employed to operate the plunger fromthe drive .shaft 3. Ve have shown what We consider as our preferredmeans in Fig. 2, where the shaft 3 is shown keyed to the hub ot theeccentric ring 7.v On the exterior of the latter is the adjusting member5. `he ring bears a series of notches 7x so arranged that the)Y may bebrought into .A further objc-rt of our invention is to i icgist" ationwith adjacent notches 8x on the i adjusting member 8 and may be held by1 means of a key 9. By unldosening the bolt 9 (see Fig. 6) and removingthe. key 9 thepositiou of the adjustingy member 8 with respect-to theeccentric ring 7 may be ad- `justed so as to vary the eccentricity ofthe 2 and 7) which is arranged to slide on the inside of the cylinder13X. The member 14 bears an integral bottom frame. Work 14X which has atits center an oil receptacle 14y.

The plunger 14 is designed to provide ported walls which are inclinedat. an angle to the horizontal bottom plane of the plunger and to thisend the plunger has a central chamber or cavity which opens belon7 andis surrounded by walls each of which is pror vided with a port 141. Eachport 141zy is shown closed by a valve 15 which is hinged to a frame 16and designed to swing inwardly in opening. The frame overlaps the outerwalls of the port and is shown inclined slightly from a vertical planeso that the valve, by gravity, will swing to its closed position againstthe frame. rThe arrangement of the valves within the/ports 14" are suchthat the frames carrying' the valves can be readily withdrawn when theretaining means which hold the frames in position are removed. As apreferred retaining means We have shown wedges 1'( which are inserted oncach side of each valve frame and on one side engage the frame and onthe other side an undercut inclined lug 18. As seen in F igs. 2 and '7,these wedges 17 can be readily withdrawn upwardly, thereby releasing theframes 16 and permitting them and the valves carried thereby to be swungoutwardly so th'at the val-ves clear the port walls, whereupon theframes and valves can be withdrawn and the valve repaired orsubstituted. As shown the bottom wall 14X of the plunger' is depressedbelow each port 142,

. the object o1 this being to increase the area of the port and to setthe valve deeper in the water in the tank. As seen in Figs. 2 and 7, theplunger is designed with four of these depressed portions and fourports, the latter being preferably equi-distantly disposed about thecenter of the plunger.

A packing ring 1S) is provided to hold the packing 20 in pesitionbetween thc ol'l'set upper end of the plunger 14 and the cylinder 13X.21 carried by the plunger 14 21ndarranged to enter slots 10L in the ring19 (sec Fig. 3f.

This ring is secured by means of bolts The top of the ringl 19 is curvedinwardly to provide room for nuts 22.

Disposed about the eccentric is a casing like that shown at 23 in Fig.4. This casing is provided with openings 24 for the shaft 3. The lowerpart of the casing is provided with flanges 23* arranged to be bolted tothebottom 14x of the plunger es shown in Fig. 2. A Wrist pin 25 issecured to the lower eX- tensions 23y of the eccentric casin 23. The arm26 of the eccentric is journa ed on the Wrist pin 25 and is integralwith the eccentric'strap 1G.

. In Fig. 5 we have shown a modified form of the Wrist pin bearing inwhich the pin 25 enters a recess 23'L in the casing 23. The head 25"` ofthe pin is held in place bylmeans of a screw cap 27. The pin isprevented from turning by means of a key 28. l

In Fig. 8 We have shown/a modified form of casing in which the lower endof the crank case 23 is continued and forms an oil well 23k whichprojects through an opening 14 in the bottom 14". In this modified formthe flanges 23x are secured to the bottom in the same manner as thatshown in F ig. 2.

It is not necessary to drop the oil receptacle 14" below the 'top levelof the plunger, though this construction is desirable to shorten thelength of the eccentric arm. As a matter of fact, the essential featureof the oiling system is that the eccentric or the equivalent ldrivemeans should be inclosed within an oil containing` chamber whichreciprccates with the plunger and the man-V ner of connecting it to the,plunger is therefore not material, and certain important advantageswould be obtained even where the design does not extend the well toinclude the Wrist pin.

From the foregoing description of 'the various parts of the device theoperation thereof may be readily understood.

The interior of the crank case is filled with oil approximately up tothe line 0 0 in Fig. 2. The oil may be introduced through the closure.As the drive shaft 8 is turned tlic plunger will be reciprocated. Itwill be i working parts therefore will be reduced to a l minimum. Theoil is entirely inclosed since the lower part of the crank case forms anoil well.

The movement of the eccentric causes the rcciproca'rion of the plunger.On the downn ward stroke of the plunger the iiap valves 15 close and onthe up stroke of the plunger the) open to admit water. Owing totheposition of the valves and the fact that they are lined lo the. plunger,it is impossible for an accumulation et Water inside the plunger beyondthat which it is desirable to have. Consequently the load on theeccentric is less than that possible with any machine in isc which thevalves are not so placed. In Fig. 1.0 it will be-seen that on the downstrokebf the plunger the water is forced upwardly through the stationaryscreen 25 upon which gold or other material to be treated is placed. Thelighter particles are lifted to the top and the heavier particles settleupon the bot tom of the screen` or perforated plate 25 from whence theyare removed through the discharge chute 27.

The main features of our invention, as stated above, relate to theconstruction of the plunger and the means for lubricating theoscillating mechanism. Vater is supplied to thel interior of the plungerbymeans of an inlet pipe 28. The construction of the plunger permits thewater to pass through the plunger and hence prevents the back suctionwhich would occur unless the Water should pass through the plunger onthe up stroke. This renders the device more uniform in its action thanin those machines in which the plungers tend to force the water throughthe screen and-then to dravv it back o the up stroke.

he fact that the-valves are carriedby the plunger 'instead oli' beinunderneath or above the plungerfalso-len s to the efficiency of themachine, since Where the plunger is solid and has to raise a heavy loadof Water the power required to returnthe device is considerably greaterthan that necessary in our device.

The positions of the valves or doors is at that portion of the tankWhere the Water is cleanest and freest from grit. The absence of gritalso tends to prolong the life of the valves thereby necessitating muchless cost intime, labor and materials in repairing or replacing them.

We prefer to incline the ported walls outwardly as it facilitates theVremoval of the valve frames, but the frames can be set vertically or atan angle inwardly and operate with equal effectiveness. By designing thevalves and their supporti g frames so that the latter' can be remove(from above and without removing the piston, We have greatly simplifiedthe maintenance and repair cost of the only delicate part of the gingmechanism.

IVe prefer to use the circular plunger working in a cylinder but thecross sectional design of thc plunger and cylinder may be variouslymodified and when we refer to tbc cvlinder we mean to include any designoi plunger chzunber or compartment in which the reciprocating plungerWorks.

IVe claim:

1. In a jigging machine, a plunger, a casing in'whicli the-plungermoves, means to reciprocate the plunger comprising an arm which ispivotcd thereto.v and an oil contain` ing casing carried by the plungerand inclosing said arm.

2l. In a jigging machine, a cylinder, a vertically reciprocatory plungertherefor, overhead means for reciprocating the plunger comprising adrive shaft and an. arm pivoted jto the plunger and eccentricallyconnected to plunger or piston therefor, a drive shaft, an

eccentric connected with said'plunger for operatingthe latter, an oilwell carried by said plunger, and a casing for said eccenm tric, saidcasing forming together with the oil Well an oil housing.

5. In a jigging machine, a plunger compartment, a plunger therein havingpqrts in its bottom, means to reciprocate the plunger, and valve meanscarried by the plunger and which, on the down stroke thereof, seal saidports, said means being removable from the top side of the plunger.

6. lIn a jigging machine, a plunger compartrnent, a plunger whichreciprocates therein and has a series of o enings in its bottom, avertically removabe frame surrounding each opening, and flap valvescarried by and adapted to seat against said frames and removabletherewith.

7. In a jigging machine, a. cylinder, a plunger carried thereby, saidplunger having a series of openings in its bottom, means forreciprocating the plunger, a trame disposed adjaccnt each opening, apivbted flap valve carried by each frame, and means for detachablysecuring the frames Vto the plunger. y

8. In a jigging machine, a cylinder, a plunger carried thereby, saidplunger bav- Ing a .series of openings in itsbotto'm, means forreciprocating the plungexg'a freinet-isposed adjacent. each opening, apivoted flap valve carried by the frame, means for securing the frame inposition, said means compri. 'n.11' lugs carried by the bottom of theplunger. and wedges disposed between the lugs and arranged to bearagainst the frame.

9. In a jgging machine, a water tank, a cylinder open at both ends, oneend of said cylinder projecting into the water in said tank, a hollowplunger disposed within said cylinder. valves carried by said hollowplunger and arranged to close on the downivard movement of the plungerand to open on the upward movemnt, means for admitlisc ting water intosaid hollow plunger, and means for reciprocating said plunger.

10. In :i jigging machine, a water tank, a cylinder open at. both ends.,one end of said cylinder projecting'iinto the water in said tank, l`ahollow plunger disposed within ing connection between the shaft; andplan-- ger which is disposed in said housing, said housingr constitilingan oil reservoir inclosed except where pierced bysaid shaft.

11.-]'11 av jigging machine, a plunger compartment, a plunger therein,means to reciprocate the plunger, an open bottom chambor formed in theunder side of Said plunger and having `ports in its side wall3 or thepassage of water through the plunger, and inwardly opening 1'lap valveshinged at their upper endsl to the plunger and adapted to close saidports on the plungers down stroke.

1Q. In a jigging machine, a plunger compartment, a plunger therein,means to reciprocate the plunger, a wall forining part ot' the bottonioil the plunger and disposed at an angle to the horizontal bottoni planeof the plunger, there heilig' :i series of-portis in said wall, and llapvalves which are hinged at their upper ends to the plunger and arrangedto close said ports on the plunges down stroke.

13. In a Jigging machine, a plunger eompartment, a .plunger therein,means to re eiproeate the plunger, said plunger being hollow and havingits bottom raisedat the center to forni a waterehamber having its .innerwall substantially upright, there being.

center to form an annular water chamber having its inner wall inclinedupwardly and outwardly, there being a series of ports in said innerwall, and flap valves on the plunger arranged to swing by gravit-y andclose said ports.

la. In a jigging machine, a plunger compartment, a plunger therein,means to reciprocate the plunger, said plunger being hollow and havingin its bottom a series of spaced water pockets having upright inwardlyfacing ported walls, and valves for closing said ports which are hingedto said plunger and arranged to swing inwardly and upwardl)lv in openingsaid ports; OSCAR H. BOI'IM. WALTER M. MCCOY.

Witnesses It.. D. JOHNSTON, Sr., Nonna lVnnsn.

